I guess the main confusion of defining this lens is probably the setting of depth/frequency. VxN64;|=
v{2DBr
The main fresnel lens types are:
F4rKFMr
cHL]y0 >
* Constant groove depth. ey)u7-O
* Contant groove pitch types. }E5#X R
)E:,V~< 8
So if your depth is fixed you will define +ve value in the cell and to specify the "height" or "depth" of each groove feature. If the frequency of the groove is fixed then you use -ve value. Say putting down - 5 this implies that there are 5 grooves with a unit length. v'Vt
.m&9&
5$oewjLO
Hope this helps!!
